The leaked Android app quickly attracted 1.1 million active users in the first eight hours. Those who downloaded the app for iOS will still be able to use it, but the unofficial Android app has been disabled.

BlackBerry says it will start to roll out BBM for Android, and continue to roll out BBM for iOS as soon as they're able to.

This is a crucial time for BlackBerry as it struggles to remain relevant in an era of iMessage, WhatsApp, and WeChat.